Small Change, Big Outage — Real SRE Incident (Firewall Rule Failure Explained)

Description

Firewall Rule Misconfiguration | Real SRE Outage Breakdown | Cloud Production Failure A tiny firewall rule update caused a major production outage. Here’s how it happened, why dashboards stayed green, and how SRE thinking helped detect and resolve the issue faster. Cloud outages rarely come from big deployments — it’s always the tiny changes nobody notices. In this video, I break down a real production incident where one small configuration update caused a major outage… while dashboards looked completely 🟢 healthy. This breakdown will teach you how SRE thinking helps diagnose issues quickly — especially when logs and metrics tell you nothing. 🔍 What You’ll Learn • ⚠️ How a single firewall rule caused a major outage • 🧩 Why internal traffic worked but external calls failed • 🔎 How tracing + flow logs solved what metrics couldn’t • 🛠️ SRE investigation patterns for faster recovery • 🚨 Why “all green” doesn’t guarantee user happiness • 🧭 The mindset needed to troubleshoot real production failures If you’re a Cloud Engineer, SRE, DevOps Engineer, Platform Engineer, or Engineering Manager — this will upgrade your real-world thinking instantly. #cloud #sre #devops #production #outage #cloudengineering #incidentmanagement #letscrackitwithkd